Claude Fable 5 1Frontier Model Comparison
Same Sticker Price, Opposite Bets: Claude Fable 5.1 vs GPT-6 Astra
Both frontier models now cost $10 in and $50 out per million tokens. Anthropic cut cache reads 75%; OpenAI reprices everything above 272K input. Which structure suits your workload.
September 11, 2026
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